Ladder



W. P. GREEN Much l1 LADDER Fild April z. 1925 William .P. Green;

ATTORNEY WITNESS:

Patented Mar. 11, 1924.

UNITED STATES WILLIAM P. GREEN, 0F SAN FRANCISCO, CALIFORNIA.

LADDER.

Application filed April 2,

I '0 all whom 2'25 may concern: v Be it known that I, WILLIAM P. GREEN,a citizen of the United States, residing at San Francisco, in the countyof San Francisco and State of California, have invented new and usefulImprovements in Ladders, of which the following is a specification.

lhis invention relates to ship ladders and contemplates a novelconstruction with a View of providing an exceedingly strong and durableladderwhich can not be easily impaired.

The nature and advantages of the invention will be better understoodwhen the following detailed description is read in connection with theaccompanying drawing, the invention residing in the. construction,combination'and arrangement of parts as claimed.

In the drawings forming-part of this application, like numerals ofreference indicate similar parts in the several views, and wherein:

Figure 1 is a fragmentary front elevation of a ladder constructed inaccordance with the present invention.

Figure 2 is a side elevation.

Figure 3 is a sectional view taken on the line 33 of Figure 2.

Figure 4 is a transverse sectional view through one side of the laddertaken immediately above one of the clamps 20.

Referring to the drawing in detail, it will be noted that the ladder ismade up of two sides which are connected together by the rungs 10. Eachside embodies a plurality of spaced sections, and the correspondingsections of the respective sides are connected together by at least twoof the rungs 10. Each section includes a plate 11 of substantiallyelliptical contour, but I desire to have it understood that the'shapeand size of these sections may be varied without departing from thespirit of the invention. Each section 11 is provided with spacedopenings 12 to receive the reduced end portions 13 of the rungs 10, thelatter being efiectively secured to the corresponding sections of therespective sides of the ladder by dowel pins 14- as shown. These pins 14are passed through transverse openings formed in each section at a rightangle to the openings 12, the openings for the dowelapins opening at theopposed edges of the section 11 Each sectlon is provided with a ropereceiving groove 15 which communicates with the openings for 1923.Serial No. 629,474.

the reception of the dowel pins. Consequently, when the rope 16 ispositioned within the groove 15 of each section, it not only serves toflexibly connect allof the sections together, but further serves to holdthe dowel pins in eifective contact with the adacent rungs of theladder, preventing casual loss or separation of these pins from thesections.

For each side of the ladder, I make use of a single length of rope, theintermediate portion of which is formed to provide a loop 17, the loopreceiving a metallic eye 18 to afford the desired strength and rigidity.The parallel portions of the rope 19 are held in contacting engagementwith each other for an appreciable portion of their length immediatelybeneath the loop 17 and the adacent section 11 by means of suitableclamps 20, and this construction is duplicated between the adjacentsections of each side as clearly illustrated. It is of course to beunderstood that the sections can be thus spaced apart any desireddistance, and there being preferably two of such clamps 20 used betweenthe. respective sections as shown. The ladder thus constructed possessesthe desired flexibility to permit it to be rolled or folded compactlywhen not in use, but at the same time affords the ladder a maximumstrength and'durability which such ladders require for safety when theyare called into use. It will be further noted that the ladder is verysimple in construction, and that the rungs 10 are so associated with thecorresponding sections of the respective side members, that-allpossibility of casual separation from said sections is reduced to aminimum.

While it is believed that from the foregoing description, the nature andadvantages of the invention will be readily apparent, I desire to haveit understood that I do not limit myself to what is herein shown anddescribed and-that such changes may be resorted to when desired as fallwithin the scope of what is claimed.

Having thus described the invention, I claim:

1. A ladder of the character described comprising spaced side members,each side member including a plurality of sections and a single lengthof cable folded upon itself, and formed to provide a loop at one end ofthe latter, each section having a groove about the edge thereof andadapted to receive the adjacent portions of the cable, rungs"connecti'ng the corresponding sections of the reings and-opening intosaid groove, en'ddowel pins received by said bones for holdingrungsflassociated with the sections, se-id -pi ns being held. inposition by thecebley and means for holding the adjacent jp r ions -offthe cable in contacting englagement betiveen' s aid 'section'sforspacingt latter.

c mpris ng Sp ced js' embers; l ch id member including (a. plmfalit jo'fsectionsj ofelliptic'elformetion, 'end'a ca {le folded upon itself, and.formed; Withia-n" eye at one end the eye to "afford the latter rigidity,each section having a groove about the edge thereof-to receive theadjacent portions of theeeble, said portions of the cable being arrangedin: parallelism and in contacting 'jengagenien-tfor e portion of theirlength,

between the respective sections for spacing seldsectionsg cleinps forholding said porand neceiye d shidopenings, each section v h vi' jber "em f i-gh e to 2. ladder "of thefch'eracter' described said and; dowelpins received by sa1d bores for holding the; rungs associated with theseetions', seid pinsfb'eing po- I

